Still, I wonder if this is really the same issue. You say it happens "everytime". The above link mentions some very specific conditions.
If the above doesn't help, go into Tools>Internet Options and reset everything you can find in all the tabs to default. Start with the security tab.
If even that doesn't help, try running IE7 in safe mode (that's iexplore -extoff from the command prompt) to see if it's an extension that makes a mess. If so, use Tools>Manage Addons to find out which one.
If this still happens with all settings set to default and no addons at all active, make a new XP user account and try there.
If even that fails, it's time to switch to Firefox.